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Two layers of the Bishop Tuff: lower layer was from ash fall, upper layer was from the main pyroclastic flow. This is a welded tuff that formed approx. 767,000 yrs ago, as a rhyolitic pyroclastic flow during the eruption that created the Long Valley Caldera. The tuff caps a volcanic plateau in the northern Owens Valley. The tableland formation is E of US Route 395, NW of Bishop and SE of Crowley Lake & Mammoth Lakes. Another part of the flow is S of Mono Lake, & surrounding the Mono-Inyo…

Two layers of the Bishop Tuff: lower layer was from ash fall, upper layer was from the main pyroclastic flow. This is a welded tuff that formed approx. 767,000 yrs ago, as a rhyolitic pyroclastic flow during the eruption that created the Long Valley Caldera. The tuff caps a volcanic plateau in the northern Owens Valley. The tableland formation is E of US Route 395, NW of Bishop and SE of Crowley Lake & Mammoth Lakes. Another part of the flow is S of Mono Lake, & surrounding the Mono-Inyo…

Dike in the Las Cañadas caldera in Tenerife, The Canary Islands.

Dike in the Las Cañadas caldera in Tenerife, The Canary Islands.

California Palmdale  Example of physical geology - folds/faults

California Palmdale Example of physical geology - folds/faults

More Rainbow Basin. Climbed up this one! Geology is the best.

More Rainbow Basin. Climbed up this one! Geology is the best.

Grasberg is no longer a hill, rather it's now one of the largest open pit mines in the world.  The engineering involved with digging such a hole, separating the valuable minerals from the rock, & then transporting the valuable stuff down to civilization is truly awesome. grasberg_mine_08.jpg 640×432 pixels

Grasberg is no longer a hill, rather it's now one of the largest open pit mines in the world. The engineering involved with digging such a hole, separating the valuable minerals from the rock, & then transporting the valuable stuff down to civilization is truly awesome. grasberg_mine_08.jpg 640×432 pixels

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